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| Home > Publications database > Untersuchungen zur thermochemischen Energiespeicherung mit Schwefeloxiden |
| Book/Report | FZJ-2018-02269 |
1983
Kernforschungsanlage Jülich, Verlag
Jülich
Please use a persistent id in citations: http://hdl.handle.net/2128/17969
Report No.: Juel-1847
Abstract: The thermochemical storage system using reversible chemical reactions seems to be attractive especially for solar energy. In this study a system using the catalytical decomposition/recombination of sulphuric oxides has been investigated for electricity production in small plants. The decomposion reaction of SO$_{3}$ is used to gather the solar energy concentrated by a field of parabolic kshes. The exothermal recombination of SO$_{2}$ and O$_{2}$ provides the energy, which can be used to generate steam required for electricity production. Two concepts have been studied and optimized. The first one using a gas turbine showed a small efficiency because of the high amount of energy needed for compressing the gasses. Additionally, gas turbines which can withstand the corrosive effect of these mediums are not available. The second concept using a steam turbine was therefore optimized for different system parameters and showed an efficiency of about 35% for the whole energy storage system and electricity production. The energy stored during 8 hours of daylight operation is suffiecient to meet electricity production demands around the clock. An economical evaluation of the systemshowed that the system, even with various simplifications as assumed here, is still not competitive with other electricity producing systems such as Diesel generators which are presently being used in isolated rural areas. The material problems involved in this special process remain still to be solved.
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